Registration Number
0220U100901,
0119U101723
, R & D reports
Title
Dynamics of colloidal particles and bacteria in anisotropic medium.
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Head
Nazarenko Vasyl H.,
Registration Date
29-01-2020
Organization
Department for special training National academy of science of Ukraine at Kiev University
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Dynamic processes in biological systems are diverse and often occur at the background of some orientational order; thus the knowledge of how the out-of-equilibrium behavior is coupled to the medium anisotropy is of importance. Our studies rely on the use of Lyotropic Chromonic Liquid Crystals for the control of bacterial activity and point the ways to encourage the bacteria to perform its movement according to the certain trajectories along the liquid crystal director. By dispersing swimming Bacillus subtilis in a liquid crystalline environment with spatially varying orientation of the anisotropy axis, we demonstrate control over the distribution of bacterial concentration, as well as the geometry and polarity of their trajectories. Bacteria recognize subtle differences in liquid crystal deformations, engaging in bipolar swimming in regions of pure splay and bend but switching to unipolar swimming in mixed splay-bend regions. Such “living liquid crystals” with controlled activity represent a versatile model system to study the relationship between the macroscopic dynamic patterns and underlying microscopic interactions.
The final result:
Product Description
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Boiko Oleksandr P.
Buluy Oleksandr G.
Selena Pavlina P.
Skivka Larysa M.
Tereshchenko Oleksandr G.
Faidiuk Iuliia V.
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2020-04-02
